Silence. No communication

I've made 3 motor vehicle claims, one being a third party. One claim was dealt with quite swiftly.
There is very little communication on the other 2 (a couple of months in).
My car is a specialised model and spares need to be sourced from a s****yard. I stressed this point, from the get go. They then received the quote from their chosen supplier. I don't know where that very expensive bumper was sourced from, but they then recommended that I s**** a car that has a couple of dents and a perfect engine. I'm trying to communicate, but everything gets lost in the ethers.....and I am disgruntled.
I'm questioning why I have comprehensive insurance. I have sourced and received a spare part. I sent a copy of the paid invoice through. Nothing.
They confidently ask us to post onto Hellopeter. So, I have.